[ios clean] Moves animator and presenters under transitions

ios/clean/chrome/browser/ui/presenters/menu_presentation_controller.mm

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/clean/chrome/browser/ui/presenters/menu_presentation_controller.h"
-
-#import <QuartzCore/QuartzCore.h>
-
-#include "ios/clean/chrome/browser/ui/commands/tools_menu_commands.h"
-#include "ios/clean/chrome/browser/ui/presenters/menu_presentation_delegate.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-@interface MenuPresentationController ()
-@property(nonatomic, weak) id<MenuPresentationDelegate> presentationDelegate;
-@property(nonatomic, assign) CGRect presentationFrame;
-@property(nonatomic, strong) UITapGestureRecognizer* dismissRecognizer;
-@end
-
-@implementation MenuPresentationController
-@synthesize presentationDelegate = _presentationDelegate;
-@synthesize presentationFrame = _presentationFrame;
-@synthesize dispatcher = _dispatcher;
-@synthesize dismissRecognizer = _dismissRecognizer;
-
-#pragma mark - UIPresentationDelegate
-
-- (CGRect)frameOfPresentedViewInContainerView {
-  if (CGRectIsEmpty(self.presentationFrame)) {
-    [self updatePresentationDelegate];
-    if (self.presentationDelegate) {
-      self.presentationFrame = [self
-          frameForPresentationWithSize:self.presentedView.frame.size
-                                origin:[self.presentationDelegate
-                                               originForMenuPresentation]
-                                bounds:[self.presentationDelegate
-                                               boundsForMenuPresentation]];
-    } else {
-      // Placeholder default frame: centered in the presenting view.
-      CGSize menuSize = self.presentedView.frame.size;
-      self.presentationFrame.size = menuSize;
-      self.presentationFrame.origin = CGPointMake(
-          (self.containerView.bounds.size.width - menuSize.width) / 2.0,
-          (self.containerView.bounds.size.height - menuSize.height) / 2.0);
-    }
-  }
-  return self.presentationFrame;
-}
-
-- (void)presentationTransitionWillBegin {
-  self.presentedView.layer.shadowRadius = 5.0f;
-  self.presentedView.layer.shadowOpacity = 0.4f;
-  self.presentedView.layer.shadowOffset = CGSizeMake(0.0f, 0.0f);
-  self.presentedView.layer.cornerRadius = 2.0f;
-
-  self.dismissRecognizer =
-      [[UITapGestureRecognizer alloc] initWithTarget:self
-                                              action:@selector(tapToDismiss:)];
-  [self.containerView addGestureRecognizer:self.dismissRecognizer];
-}
-
-#pragma mark - Private methods.
-
-- (void)tapToDismiss:(UIGestureRecognizer*)recognizer {
-  [self.dispatcher closeToolsMenu];
-}
-
-// Checks if the presenting view controller conforms to
-// MenuPresentationDelegate and, if so, sets that view controller as the
-// presentation delegate. This can't be done at init time, becuase the
-// presenting view controller may not have been determined by UIKit yet.
-- (void)updatePresentationDelegate {
-  if ([self.presentingViewController
-          conformsToProtocol:@protocol(MenuPresentationDelegate)]) {
-    self.presentationDelegate = static_cast<id<MenuPresentationDelegate>>(
-        self.presentingViewController);
-  }
-}
-
-- (CGRect)frameForPresentationWithSize:(CGSize)menuSize
-                                origin:(CGRect)menuOriginRect
-                                bounds:(CGRect)presentationBounds {
-  CGRect menuRect;
-  menuRect.size = menuSize;
-
-  if (CGRectIsNull(menuOriginRect)) {
-    menuRect.origin = CGPointMake(50, 50);
-    return menuRect;
-  }
-  // Calculate which corner of the menu the origin rect is in. This is
-  // determined by comparing frames, and thus is RTL-independent.
-  if (CGRectGetMinX(menuOriginRect) - CGRectGetMinX(presentationBounds) <
-      CGRectGetMaxX(presentationBounds) - CGRectGetMaxX(menuOriginRect)) {
-    // Origin rect is closer to the left edge of |self.view| than to the right.
-    menuRect.origin.x = CGRectGetMinX(menuOriginRect);
-  } else {
-    // Origin rect is closer to the right edge of |self.view| than to the left.
-    menuRect.origin.x = CGRectGetMaxX(menuOriginRect) - menuSize.width;
-  }
-
-  if (CGRectGetMinY(menuOriginRect) - CGRectGetMinY(presentationBounds) <
-      CGRectGetMaxY(presentationBounds) - CGRectGetMaxY(menuOriginRect)) {
-    // Origin rect is closer to the top edge of |self.view| than to the bottom.
-    menuRect.origin.y = CGRectGetMinY(menuOriginRect);
-  } else {
-    // Origin rect is closer to the bottom edge of |self.view| than to the top.
-    menuRect.origin.y = CGRectGetMaxY(menuOriginRect) - menuSize.height;
-  }
-
-  return menuRect;
-}
-
-@end